import matplotlib.pyplot as plt
import numpy as np
data =np.array([20,50,10,15,30,55])
pie_labels=np.array(['A','B','C','D','E','F'])
plt.pie(data,radius=1.5,wedgeprops={'width': 0.7},labels=pie_labels,autopct='%3.1f%%',pctdistance=0.75)
plt.title('hello')
plt.show()